Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
Fourmile, Custer District, Custer Co., South Dakota, USA

Oldest recorded age at locality: 1710
Youngest recorded age at locality: 1580

mindat Locality ID: 26805
mindat URL: http://www.mindat.org/loc-26805.html

Tectonic Settings:

Total number of sublocalities beneath "Fourmile, Custer District, Custer Co., South Dakota, USA": 8
Total number of bottom-level sublocalities: 8

Number of Child Localities: 8
Child Localities:
Helen Beryl Mine (Sweepstakes Beryl; Big Tom Claim; Kem Claim)
Island Mine
Old Charlie Mine
Pleasant Valley Pegmatite
Rainbow No. 4 Mine
Rocky Ridge Mine
Tin Mountain Mine
Tip Top Mine (Tip Top Pegmatite)

Latitude: 43°43'33"N
Longitude: 103°41'4"W
Decimal Degree (lat, lon): 43.725833333333,-103.68444444444
AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al As B Ba Be Bi C Ca Cl Cs Cu F Fe H K Li Mg Mn Na Nb O P Pb S Si Sn Sr Ta U V Y Zn Zr 

Elements from minerals reported directly at this locality: Bi C O 

Structural Groups for minerals in this locality: 
AlluauditeAluniteAmorphousAnalcimeApatiteArsenicArseniosideriteArsenopyriteArthuriteAutunite
BerauniteBerylBismutiteBjarebyiteCalcioferriteCalciteCancriniteCancrinite-sodaliteCeriteChalcopyrite
ChildreniteChloriteClayClinozoisiteColumbiteCorundumCovelliteDanburiteDiasporeDufrénite
EpidoteFairfielditeFeldsparFluoriteGadoliniteGarnetHopeiteHureauliteJahnsiteKaolinite
LöllingiteLaueiteLazuliteLeucophosphiteMalachiteMarcasiteMeta-autuniteMicaNoneNot in a structural group
OlivineOveritePharmacosideritePyritePyroxeneQuartzReddingiteRockbridgeiteRocksaltRoscherite
RutileSchoepiteSmectite-vermiculiteSphaleriteSpinelStewartiteStibniteStrunziteTourmalineVivianite
WagneriteWarditeZircon

133 IMA Minerals at location:
Albite  (*)Alluaudite  (*)Almandine  (*)Amblygonite  (*)Arseniosiderite  (*)
Arsenopyrite  (*)Aurichalcite  (*)Autunite  (*)Azurite  (*)Barbosalite  (*)
Beraunite  (*)Bermanite  (*)Bertrandite  (*)Beryl  (*)Bismuth  (*)
Bismuthinite  (*)Bismutite  (*)Bornite  (*)Calcite  (*)Cassiterite  (*)
Chalcopyrite  (*)Childrenite  (*)Chrysoberyl  (*)Collinsite  (*)Cookeite  (*)
Covellite  (*)Crandallite  (*)Cyrilovite  (*)Dawsonite  (*)Diadochite  (*)
Dufrénite  (*)Ehrleite  (*)Elbaite  (*)Englishite  (*)Eosphorite  (*)
Epidote  (*)Fairfieldite  (*)Ferrisicklerite  (*)Fluorapatite  (*)Fourmarierite  (*)
Fransoletite  (*)Frondelite  (*)Galena  (*)Goethite  (*)Gordonite  (*)
Goyazite  (*)Greifensteinite  (*)Hematite  (*)Hemimorphite  (*)Heterosite  (*)
Hopeite  (*)Hureaulite  (*)Hurlbutite  (*)Hydroxylapatite  (*)Hydroxylherderite  (*)
Hydrozincite  (*)Ixiolite  (*)Jahnsite-(CaMnMg)  (*)Jahnsite-(NaFeMg)  (*)Jahnsite-(NaMnMg)  (*)
Kaolinite  (*)Kasolite  (*)Kidwellite  (*)Kingsmountite  (*)Kryzhanovskite  (*)
Laueite  (*)Leucophosphite  (*)Lithiophosphate  (*)Löllingite  (*)Ludlamite  (*)
Magnetite  (*)Malachite  (*)Marcasite  (*)Messelite  (*)Meta-autunite  (*)
Metaswitzerite  (*)Microcline  (*)Mitridatite  (*)Montebrasite  (*)Montgomeryite  (*)
Montmorillonite  (*)Muscovite  (*)Opal  (*)Pahasapaite  (*)Parafransoletite  (*)
Pararobertsite  (*)Parascholzite  (*)Perloffite  (*)Pharmacosiderite  (*)Phosphoferrite  (*)
Pollucite  (*)Purpurite  (*)Pyrite  (*)Pyrolusite  (*)Quartz  (*)
Robertsite  (*)Rockbridgeite  (*)Roscherite  (*)Scholzite  (*)Schorl  (*)
Scorodite  (*)Segelerite  (*)Sicklerite  (*)Siderite  (*)Sillimanite  (*)
Smithsonite  (*)Spessartine  (*)Sphalerite  (*)Spodumene  (*)Stewartite  (*)
Strengite  (*)Strunzite  (*)Switzerite  (*)Tavorite  (*)Tinsleyite  (*)
Tiptopite  (*)Todorokite  (*)Triphylite  (*)Triploidite  (*)Uraninite  (*)
Uranophane-α  (*)Ushkovite  (*)Vanadinite  (*)Vandendriesscheite  (*)Vivianite  (*)
Wardite  (*)Whiteite-(CaMnMg)  (*)Whitlockite  (*)Whitmoreite  (*)Wyllieite  (*)
Xanthoxenite  (*)Xenotime-(Y)  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)171015805264825,264828,264829,264831,2648328803
Alluaudite  (*)Alluaudite   NaMnFe3+2(PO4)3170217023264825,264829,26483294
Almandine  (*)GarnetFe2+3Al2(SiO4)3171015803264829,264831,2648322353
Amblygonite  (*)NoneLiAl(PO4)F171015804264825,264828,264831,264832244
Arseniosiderite  (*)ArseniosideriteCa2Fe3+3O2(AsO4)3·3H2O170217021264832194
Arsenopyrite  (*)ArsenopyriteFeAsS1702170212648329052
Aurichalcite  (*)None(Zn,Cu)5(CO3)2(OH)6171015801264831919
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O171015803264829,264831,2648321272
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)21710158012648315509
Barbosalite  (*)LazuliteFe2+Fe3+2(PO4)2(OH)217021702126483243
Beraunite  (*)BerauniteFe3+6(PO4)4O(OH)4·6H2O170217021264832136
Bermanite  (*)ArthuriteMn2+Mn3+2(PO4)2(OH)2·4H2O17021702126483255
Bertrandite  (*)Not in a structural groupBe4Si2O7(OH)2170217021264825606
Beryl  (*)BerylBe3Al2Si6O18171015806264825,264828,264829,264830,264831,2648324286
Bismuth  (*)ArsenicBi171015802264831,2648321966
Bismuthinite  (*)StibniteBi2S31710158012648311935
Bismutite  (*)BismutiteBi2O2(CO3)171015800716
Bornite  (*)NoneCu5FeS41710158012648315516
Calcite  (*)CalciteCa(CO3)17101580126483127770
Cassiterite  (*)RutileSnO2171015803264825,264831,2648325171
Chalcopyrite  (*)ChalcopyriteCuFeS217101580126483127198
Childrenite  (*)ChildreniteFe2+Al(PO4)(OH)2·H2O17021702126482593
Chrysoberyl  (*)OlivineBeAl2O4170217021264830321
Collinsite  (*)FairfielditeCa2Mg(PO4)2·2H2O17021702126483238
Cookeite  (*)Chlorite Clay(Al,Li)3Al2(Si,Al)4O10(OH)8171015801264831181
Covellite  (*)CovelliteCuS1710158012648314165
Crandallite  (*)AluniteCaAl3(PO4)(PO3OH)(OH)6170217021264832310
Cyrilovite  (*)WarditeNaFe3+3(PO4)2(OH)4·2H2O17021702126483260
Dawsonite  (*)NoneNaAl(CO3)(OH)217101580126483190
Diadochite  (*)AmorphousFe3+2(PO4)(SO4)(OH)·6H2O17021702126483281
Dufrénite  (*)DufréniteCa0.5Fe2+Fe3+5(PO4)4(OH)6·2H2O170217021264832139
Ehrleite  (*)NoneCa2ZnBe(PO4)2(PO3OH)·4H2O1702170212648321
Elbaite  (*)TourmalineNa(Al1.5Li1.5)Al6(Si6O18)(BO3)3(OH)3(OH)170217021264832520
Englishite  (*)NoneK3Na2Ca10Al15(OH)7(PO4)21·26H2O1702170212648326
Eosphorite  (*)ChildreniteMn2+Al(PO4)(OH)2·H2O170217021264832128
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)1702170212648258173
Fairfieldite  (*)FairfielditeCa2Mn2+(PO4)2·2H2O17021702126483272
Ferrisicklerite  (*)OlivineLi1-x(Fe3+,Mn2+)(PO4)171015803264829,264831,264832108
Fluorapatite  (*)ApatiteCa5(PO4)3F171015803264825,264831,2648322740
Fourmarierite  (*)SchoepitePb1-xO3-2x(UO2)4(OH)4+2x·4H2O171015802264829,26483161
Fransoletite  (*)NoneCa3Be2(PO4)2(PO3OH)2·4H2O1702170212648321
Frondelite  (*)Rockbridgeite(Mn2+0.5Fe3+0.5)2Fe3+3(PO4)3(OH)517021702126483252
Galena  (*)RocksaltPbS17021702126483224243
Goethite  (*)DiasporeFeO(OH)171015802264831,2648327437
Gordonite  (*)LaueiteMgAl2(PO4)2(OH)2·8H2O17021702126483218
Goyazite  (*)AluniteSrAl3(PO4)(PO3OH)(OH)6170217021264832173
Greifensteinite  (*)RoscheriteCa2Be4Fe2+5(PO4)6(OH)4·6H2O17021702126483227
Hematite  (*)CorundumFe2O317021702126482514640
Hemimorphite  (*)Not in a structural groupZn4(Si2O7)(OH)2·H2O1710158012648311689
Heterosite  (*)OlivineFe3+(PO4)170217024264825,264828,264829,264832204
Hopeite  (*)HopeiteZn3(PO4)2·4H2O17021702126483229
Hureaulite  (*)HureauliteMn2+5(PO3OH)2(PO4)2·4H2O170217021264832125
Hurlbutite  (*)DanburiteCaBe2(PO4)217021702126483214
Hydroxylapatite  (*)ApatiteCa5(PO4)3OH170217021264832367
Hydroxylherderite  (*)GadoliniteCaBe(PO4)(OH)170217021264832119
Hydrozincite  (*)NoneZn5(CO3)2(OH)61710158012648311066
Ixiolite  (*)Columbite(Ta2/3Mn2+1/3)O2170217021264825148
Jahnsite-(CaMnMg)  (*)JahnsiteCaMn2+Mg2Fe3+2(PO4)4(OH)2·8H2O17021702126483214
Jahnsite-(NaFeMg)  (*)JahnsiteNaFe3+Mg2Fe3+2(PO4)4(OH)2·8H2O1702170212648323
Jahnsite-(NaMnMg)  (*)Jahnsite(Na,Ca)(Mn2+,Fe3+)(Mg,Fe3+)2Fe3+2(PO4)4(OH)2(H2O)81702170212648323
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)41710158012648315591
Kasolite  (*)NonePb(UO2)(SiO4)·H2O171015801264831198
Kidwellite  (*)NoneNaFe3+9+x(PO4)6(OH)11·3H2O (x ≈ 0.33)17021702126483253
Kingsmountite  (*)CalcioferriteCa3MnFe2+Al4(PO4)6(OH)4·12H2O17021702126483212
Kryzhanovskite  (*)Reddingite(Fe3+,Mn2+)3(PO4)2(OH,H2O)317021702126483234
Laueite  (*)LaueiteMn2+Fe3+2(PO4)2(OH)2·8H2O17021702126483270
Leucophosphite  (*)LeucophosphiteKFe3+2(PO4)2(OH)·2H2O170217021264832110
Lithiophosphate  (*)NoneLi3(PO4)1702170212648327
Löllingite  (*)LöllingiteFeAs2171015801264831762
Ludlamite  (*)NoneFe2+3(PO4)2·4H2O17021702126483266
Magnetite  (*)SpinelFe2+Fe3+2O417101580126483114899
Malachite  (*)MalachiteCu2(CO3)(OH)217101580126483112537
Marcasite  (*)MarcasiteFeS21702170212648325674
Messelite  (*)FairfielditeCa2Fe2+(PO4)2·2H2O17021702126483243
Meta-autunite  (*)Meta-autuniteCa(UO2)2(PO4)2·6H2O171015802264831,264832388
Metaswitzerite  (*)NoneMn2+3(PO4)2·4H2O17021702126483222
Microcline  (*)FeldsparK(AlSi3O8)171015805264825,264828,264829,264831,2648324924
Mitridatite  (*)ArseniosideriteCa2Fe3+3O2(PO4)3·3H2O170217021264832129
Montebrasite  (*)NoneLiAl(PO4)(OH)171015802264831,264832200
Montgomeryite  (*)CalcioferriteCa4MgAl4(PO4)6(OH)4·12H2O17021702126483244
Montmorillonite  (*)Clay Smectite-vermiculite(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O1710158012648311508
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2171015806264825,264828,264829,264830,264831,26483217380
Opal  (*)AmorphousSiO2·nH2O1702170212648252994
Pahasapaite  (*)NoneLi8(Ca,Li,K)10Be24(PO4)24·38H2O1702170212648321
Parafransoletite  (*)NoneCa3Be2(PO4)2(PO3OH)2·4H2O1702170212648321
Pararobertsite  (*)NoneCa2Mn3+3(PO4)3O2·3H2O1702170212648321
Parascholzite  (*)NoneCaZn2(PO4)2·2H2O17021702126483212
Perloffite  (*)BjarebyiteBaMn2+2Fe3+2(PO4)3(OH)31702170212648327
Pharmacosiderite  (*)PharmacosideriteKFe3+4(AsO4)3(OH)4·6-7H2O170217021264832428
Phosphoferrite  (*)ReddingiteFe2+3(PO4)2·3H2O17021702126483231
Pollucite  (*)AnalcimeCs(Si2Al)O6·nH2O171015801264831140
Purpurite  (*)OlivineMn3+(PO4)17021702126482580
Pyrite  (*)PyriteFeS217021702126483239462
Pyrolusite  (*)RutileMnO21710158012648313106
Quartz  (*)QuartzSiO2171015806264825,264828,264829,264830,264831,26483261156
Robertsite  (*)ArseniosideriteCa2Mn3+3O2(PO4)3·3H2O17021702126483236
Rockbridgeite  (*)Rockbridgeite(Fe2+0.5Fe3+0.5)2Fe3+3(PO4)3(OH)5170217022264829,264832206
Roscherite  (*)RoscheriteCa2Mn2+5Be4(PO4)6(OH)4·6H2O17021702126483222
Scholzite  (*)NoneCaZn2(PO4)2·2H2O17021702126483220
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)171015804264825,264828,264831,2648322705
Scorodite  (*)NoneFe3+(AsO4)·2H2O1702170212648321153
Segelerite  (*)OveriteCaMgFe3+(PO4)2(OH)·4H2O1702170212648322
Sicklerite  (*)OlivineLiMn2+(PO4)170217023264825,264829,26483266
Siderite  (*)CalciteFe(CO3)171015803264829,264831,2648326417
Sillimanite  (*)Not in a structural groupAl2SiO51702170212648251516
Smithsonite  (*)CalciteZn(CO3)1710158012648312473
Spessartine  (*)GarnetMn2+3Al2(SiO4)31702170212648321214
Sphalerite  (*)SphaleriteZnS171015803264828,264831,26483221482
Spodumene  (*)PyroxeneLiAlSi2O6171015802264825,264831688
Stewartite  (*)StewartiteMn2+Fe3+2(PO4)2(OH)2·8H2O17021702126483248
Strengite  (*)NoneFe3+(PO4)·2H2O170217021264832263
Strunzite  (*)StrunziteMn2+Fe3+2(PO4)2(OH)2·6H2O17021702126483298
Switzerite  (*)NoneMn2+3(PO4)2·7H2O17021702126483221
Tavorite  (*)NoneLiFe3+(PO4)(OH)17021702126483235
Tinsleyite  (*)LeucophosphiteKAl2(PO4)2(OH)·2H2O1702170212648329
Tiptopite  (*)Cancrinite Cancrinite-sodaliteK2(Li,Na,Ca)6(Be6P6)O24(OH)2·1.3H2O1702170212648321
Todorokite  (*)None(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12·3-4H2O170217021264832433
Triphylite  (*)OlivineLiFe2+(PO4)171015805264825,264828,264829,264831,264832313
Triploidite  (*)WagneriteMn2+2(PO4)(OH)17021702126483229
Uraninite  (*)FluoriteUO2171015803264829,264831,2648322718
Uranophane-α  (*)NoneCa(UO2)2(SiO3OH)2·5H2O171015802264829,264831890
Ushkovite  (*)LaueiteMgFe3+2(PO4)2(OH)2·8H2O17021702126483218
Vanadinite  (*)ApatitePb5(VO4)3Cl170217021264829605
Vandendriesscheite  (*)NonePb1.6(UO2)10O6(OH)11·11H2O171015802264829,26483152
Vivianite  (*)VivianiteFe2+3(PO4)2·8H2O170217022264825,264832636
Wardite  (*)WarditeNaAl3(PO4)2(OH)4·2H2O17021702126483258
Whiteite-(CaMnMg)  (*)JahnsiteCaMn2+Mg2Al2(PO4)4(OH)2·8H2O1702170212648327
Whitlockite  (*)CeriteCa9Mg(PO3OH)(PO4)6170217022264832104
Whitmoreite  (*)ArthuriteFe2+Fe3+2(PO4)2(OH)2·4H2O17021702126483236
Wyllieite  (*)NoneNaNaMn(Fe2+Al)(PO4)317021702126483217
Xanthoxenite  (*)NoneCa4Fe3+2(PO4)4(OH)2·3H2O17021702126483229
Xenotime-(Y)  (*)ZirconY(PO4)171015801264831939
Zircon  (*)ZirconZr(SiO4)171015803264829,264831,2648325251


5 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
Be-00046170217021702  high   YesFaheyiteBe45259Roosevelt Group (Rough Rider), Custer, Custer District, Custer Co., South Dakota, USA Dahl and Foland (2008)10.2138/am.2008.2633AM93_1215 
Scott-GCA51_1101-0001171015801710-1580Rb-Srage of intrusionk-feldspar11-4A    4121Tin Mountain Mine, Fourmile, Custer District, Custer Co., South Dakota, USATin MountainClark and Černý (1987)10.1016/0016-7037(87)90112-8GCA51_1101Table 1
Be-00023170217021702  high    Ehrleite, Fransoletite, Greifensteinite, Pahasapaite, Parafransoletite, Roscherite, TiptopiteBe4122Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA Dahl and Foland (2008)10.2138/am.2008.2633AM93_1215 
Grew_Li_2019_0108170217021702      Tavorite 4122Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USATip Top mine, Fourmile quadrangle, Custer County, South Dakota USADahl and Foland (2008)10.2138/am.2008.2633AM93_1215 
Grew_Li_2019_0109170217021702      Tiptopite 4122Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USATip Top mine, Fourmile quadrangle, Custer County, South Dakota USADahl and Foland (2008)10.2138/am.2008.2633AM93_1215 

SampleSource LocalityReference URL
R141067Pleasant Valley Pegmatite, Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R141067
R130057Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R130057
R070653Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R070653
R070654Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R070654
R100214Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R100214
R100215Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R100215
R110026Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R110026
R070630Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R070630
R070613Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R070613
R070452Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R070452
R060213Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R060213
R080072Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R080072
R080126Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R080126
R070631Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R070631
R130056Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R130056
R120119Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R120119
R060806Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R060806
R120040Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R120040
R130045Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R130045
R060858Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R060858
R130054Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R130054
R080068Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R080068
R080127Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R080127
R070706Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R070706
R070609Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R070609
R130055Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R130055
R140770Tip Top Mine (Tip Top Pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USAhttps://rruff.info/R140770

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